InkBird Thermostat To power the Inkbird, plug in the Everwarm 2.0 plug (formerly shoreline). On the 12vDC Panel, the Main 50Amp switch as well as the “Fresh Water” switch must be “ON” and illuminated. When the Fresh Water tank temperature (PV) is below the set point (SV), it will allow the Fresh Water pump to circulate water through the Water Heater to warm the entire Fresh Water tank. PV is the current temperature of the Fresh Water tank. SV is the set temperature the Water Heater will warm the Fresh Water Tank.